Question
Sophia wants to buy 16 identical pens as follows.
1 for $4.30
6 for $25.60
What is the least amount of money she needs to buy 16 such pens?
3 m

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Sophia wants to buy 16 identical pens as follows.
1 for $4.30
6 for $25.60
What is the least amount of money she needs to buy 16 such pens?